prometheus/storage/local/chunk.go
Julius Volz 8dfaa5ecd2 Remove use of freelists for chunk bufs.
Change-Id: Ib887fdb61e1d96da0cd32545817b925ba88831c1
2014-11-25 17:02:00 +01:00

66 lines
1.4 KiB
Go

package storage_ng
import (
"io"
clientmodel "github.com/prometheus/client_golang/model"
"github.com/prometheus/prometheus/storage/metric"
)
type chunks []chunk
type chunk interface {
add(*metric.SamplePair) chunks
clone() chunk
firstTime() clientmodel.Timestamp
lastTime() clientmodel.Timestamp
newIterator() chunkIterator
marshal(io.Writer) error
unmarshal(io.Reader) error
// TODO: remove?
values() <-chan *metric.SamplePair
}
type chunkIterator interface {
getValueAtTime(clientmodel.Timestamp) metric.Values
getBoundaryValues(metric.Interval) metric.Values
getRangeValues(metric.Interval) metric.Values
contains(clientmodel.Timestamp) bool
}
func transcodeAndAdd(dst chunk, src chunk, s *metric.SamplePair) chunks {
numTranscodes.Inc()
head := dst
body := chunks{}
for v := range src.values() {
newChunks := head.add(v)
body = append(body, newChunks[:len(newChunks)-1]...)
head = newChunks[len(newChunks)-1]
}
newChunks := head.add(s)
body = append(body, newChunks[:len(newChunks)-1]...)
head = newChunks[len(newChunks)-1]
return append(body, head)
}
func chunkType(c chunk) byte {
switch c.(type) {
case *deltaEncodedChunk:
return 0
default:
panic("unknown chunk type")
}
}
func chunkForType(chunkType byte) chunk {
switch chunkType {
case 0:
return newDeltaEncodedChunk(d1, d0, true)
default:
panic("unknown chunk type")
}
}